From 85253bd2a281b708e5d74a81d360780b96aa51bc Mon Sep 17 00:00:00 2001
From: "Gregory.Shrago" <gregory.shrago@jetbrains.com>
Date: Sun, 24 Nov 2013 20:23:30 +0400
Subject: [PATCH] introduce multi-token nextTokenIs()

---
 .../lang/parser/GeneratedParserUtilBase.java  | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/platform/lang-impl/src/com/intellij/lang/parser/GeneratedParserUtilBase.java b/platform/lang-impl/src/com/intellij/lang/parser/GeneratedParserUtilBase.java
index c9b9ae264a7e..d18bf4c5dff7 100644
--- a/platform/lang-impl/src/com/intellij/lang/parser/GeneratedParserUtilBase.java
+++ b/platform/lang-impl/src/com/intellij/lang/parser/GeneratedParserUtilBase.java
@@ -173,6 +173,33 @@ public class GeneratedParserUtilBase {
     return builder_.getTokenType() == token;
   }
 
+  public static boolean nextTokenIsFast(PsiBuilder builder_, IElementType... tokens) {
+    IElementType tokenType = builder_.getTokenType();
+    for (IElementType token : tokens) {
+      if (token == tokenType) return true;
+    }
+    return false;
+  }
+
+  public static boolean nextTokenIs(PsiBuilder builder_, String frameName, IElementType... tokens) {
+    ErrorState state = ErrorState.get(builder_);
+    if (state.completionState != null) return true;
+    boolean track = !state.suppressErrors && state.predicateCount < 2 && state.predicateSign;
+    if (!track) return nextTokenIsFast(builder_, tokens);
+    boolean useFrameName = StringUtil.isNotEmpty(frameName);
+    IElementType tokenType = builder_.getTokenType();
+    if (tokenType == null) return false;
+    boolean result = false;
+    for (IElementType token : tokens) {
+      if (!useFrameName) addVariant(builder_, state, token);
+      result |= tokenType == token;
+    }
+    if (useFrameName) {
+      addVariantInner(state, builder_.getCurrentOffset(), frameName);
+    }
+    return result;
+  }
+
   public static boolean nextTokenIs(PsiBuilder builder_, IElementType token) {
     return nextTokenIsInner(builder_, token, false);
   }
@@ -187,6 +214,7 @@ public class GeneratedParserUtilBase {
     return token == tokenType;
   }
 
+  @Deprecated
   public static boolean replaceVariants(PsiBuilder builder_, int variantCount, String frameName) {
     ErrorState state = ErrorState.get(builder_);
     if (!state.suppressErrors && state.predicateCount < 2 && state.predicateSign) {